在主函数中，将zhangsan年龄修改19，私有成员不能直接访问，添加一个setAge函数
例如下边的代码，person类的age属性就是私有的，如果访问就要通过创建person类的对象，并且setAge方法来访问age属性，实现赋值
public class Person {
private String name;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "Person{" +
"name='" + name + '\'' +
", age=" + age +
'}';
}
}
public class Test {
public static void main(String[] args) {
Person person = new Person();
person.setName("张三");
person.setAge(100);
System.out.println(person);
}
}
public class Student {
private String name;
private int age;
public Student() {
}
public Student(String name,int age) {
this.name=name;
this.age=age;
}
public void setName(String name) {
this.name=name;
}
public String getName() {
return name;
}
public void setAge(int age) {
this.age=age;
}
public int getAge() {
return age;
}
}